rackin not reaching temp

[watts501]

i posted my rackin system up a couple of weeks ago!!i am worried that it isnt reaching temp!i am only using one heat cable should i be using 3/4 instead smaller ones??thanks matt

[Tim_Cranwill]

You'll need to give a few more details if you want some decent help. :)

What type of rack, what are the temps you're getting, how are they being measured, how are you controlling the temperature and etc?

[watts501]

I am measuring the temperature with a Thermometer in each container. I am only getting around 75 when it should be around 85 instead!I am using a Habistat Pulse Thermostat

[mykee]

No pic under that link, and I'm sorry, but I can't read your English (at least I think it's English).
With that limited info, I would say you should turn up the heat, or set your thermostat higher.